Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45c1efef4637839…

MALICIOUS

PDF

72.4 KB Created: 2021-02-18 12:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: feeff796b3ca453d236a59603c0b3a12 SHA-1: 52950c1427fdb01ca6301041412e99b17c45349e SHA-256: f45c1efef46378397e15ae1d131af428d1ea85b119c663547436f5e2fe186507
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Phishing.Trojan. The presence of numerous external links suggests a malicious intent, likely to direct users to phishing sites or to manipulate search engine results. No scripts were extracted, but the embedded links are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/123?utm_term=magic+bullet+blender+cup+sizes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454421/normal_6000531d57102.pdfIn PDF document text
    • http://jadivaza.iblogger.org/58379308148.pdfIn PDF document text
    • http://tisimewifexumi.iblogger.org/xawoparisisove.pdfIn PDF document text
    • https://nozonefabizeg.weebly.com/uploads/1/3/0/9/130969368/f9523b8d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_6014b7f337e9f.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/chcicjd/9885275992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_5fc91609be395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492574/normal_5ff858f2b1c0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500893/normal_6005d9b1c1e03.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/jjP7TAd/2_guns_movie_age_rating.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_6015b6aa74aa0.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/fnZhfcD/telehealth_doctor_appointment_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/jiWgdha/53089515745.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495271/normal_5ffbef598216b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimibidubarabus.epizy.com/partition_de_amazing_grace.pdfIn PDF document text
    • http://dokubuxopid.rf.gd/decision_making_matrix_template_excel.pdfIn PDF document text
    • http://bumosutu.rf.gd/55477953969.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 5436 bytes
SHA-256: a4e14388ed6fa0d61e4411ed24e1268b525c69116f2913b0f5cb72d0ec61a7f7
font_01_sfnt_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 10616 bytes
SHA-256: 812a7735a55a5d11ca78981f5f6c8eada1a5f0686ea8b0ade496e924cd2eecc9

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